L9918 datasheet(102/109 Pages) STMICROELECTRONICS

102 / 109 page

Contents

Functional description .............................................................2

1.1

External component required..................................................... 2

1.2

Pin description ................................................................. 3

1.2.1

EXC .................................................................. 3

1.2.2

B+ .................................................................... 3

1.2.3

GND .................................................................. 3

1.2.4

LIN ................................................................... 3

1.2.5

PH.................................................................... 3

1.3

List of device features........................................................... 3

1.3.1

Standby current.......................................................... 3

1.3.2

Closed loop voltage control ................................................. 4

1.3.3

Load response control (LRC) ............................................... 4

1.3.4

Pre-excitation ........................................................... 4

1.3.5

Phase regulation ......................................................... 4

1.3.6

Low voltage function ...................................................... 4

1.3.7

Overvoltage safety function................................................. 4

1.3.8

Overvoltage function ...................................................... 4

1.3.9

Excitation current measurements ............................................ 4

1.3.10

Current limitation and overcurrent protection.................................... 4

1.3.11

Temperature measurements ................................................ 5

1.3.12

High temperature voltage limitation ........................................... 5

1.3.13

Self-start ............................................................... 5

1.3.14

Non volatile memory (NVM) ................................................ 5

1.3.15

Local interconnect network (LIN) interface ..................................... 5

1.3.16

Compatibility with different alternator types ..................................... 5

1.4

Internal block diagram .......................................................... 6

1.4.1

Power supplies .......................................................... 6

1.4.2

Phase interface .......................................................... 6

1.4.3

LIN interface ............................................................ 6

1.4.4

Stand-by digital block ..................................................... 6

1.4.5

Voltage divider & ΣΔ modulator for regulation ................................... 6

L9918

Contents

DS13000 - Rev 2

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